'Add' in the Bible

You shall not add to the word which I command you, neither shall you diminish from it, that you may keep the commandments of Yahweh your God which I command you.

Whatever thing I command you, that you shall observe to do: you shall not add thereto, nor diminish from it.

if you keep all this commandment to do it, which I command you this day, to love Yahweh your God, and to walk ever in his ways; then you shall add three cities more for yourselves, besides these three: